1. Model: 010028 (three-function self-locking gear box)

2. Transmission ratio: A, high speed 1/15 B, low speed: 1/56.25

3. Outer diameter: A, gear box: 40mm B, torque cup: 48mm

4. Length: 73.4mm

5. Speed control method: pin + speed control ring

6. Optional shaft lock function